Spoiler!
If i remember correctly there is a kana biological mother potrait and about strange behaviour of raphel because he loves kana and he knows she doesn't have memories yet and he is controlling himself that's why he is avoiding her and soon the divorce arc will start and after the divorce kana younger brother will kidnap her and lock her in a island so no one can find her and in future kana will possess her biological mother body and duke of addis (kana current father) will fall in love with her and she told the duke to protect her when she is born in the future
